Well, it's just that I can't really mod or make animations, but I got plenty of stories, designs, missions in my head. For the basics I only need a mapper and scripter, eventually some models, but to spice it up I could use some animations, models, ... .

Unfortunetly that is not what modders want to hear. It roughly translates to: "I have ideas and want other people to make them for me. I won't actually contribute anything, but I'll critique it if it is not what I want."

Modders already have things they're working on so chances are they aren't going to stop what they're doing to do your work as well.